OBD-II code · Powertrain (generic, extended)
P2A98 Alternative Fuel Tank Select Valve B Control Circuit High
The control circuit of alternative fuel tank select valve B reports a control circuit high condition. Tank selection on multi-tank CNG/LPG systems cannot be commanded reliably.
Is it safe to drive with P2A98?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyControl wire shorted to B+
- PossibleOpen valve coil
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Likely to fail
- Parts involved
- Alt Fuel Tank Select Valve B, Wiring Harness, Afcm
Related codes
- P2A94Alternative Fuel Tank Select Valve A Control Circuit High
- P2A9CAlternative Fuel Tank Select Valve C Control Circuit High
- P2A95Alternative Fuel Tank Select Valve B Control Circuit/Open
- P2A96Alternative Fuel Tank Select Valve B Control Circuit Performance
- P2A97Alternative Fuel Tank Select Valve B Control Circuit Low
- P2A99Alternative Fuel Tank Select Valve C Control Circuit/Open
- P2A9AAlternative Fuel Tank Select Valve C Control Circuit Performance
- P2A9BAlternative Fuel Tank Select Valve C Control Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.